You're on, mate, you're Eccles' stand-in.
9 seconds sound clip from The Goon Show, Series 9, The Mountain Eaters classic radio program.
You can hear this line at 00:09:59 in the radio play.
Quote context
[...]
- You see, mate, the moment 'e eats a mountain, 'ollywood will be screaming for 'im.
- Oh, I say, do you need a stand-in?
- I am expecting fifty pounds.
- Fifty pounds? How much is that then? I mean, which side of 'alf-a-crown is it on?
- You're on, mate, you're Eccles' stand-in.
- The luxurious and naughty Hotel Disgrat in Venice.
- Agh, this is it. This is the bonne vie, la bon mot.
- Moriarty, pass me another strand of fume spaghetti... Delicious, delicious!
[...]